• 대한수의학회지
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• 제39권6호
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• pp.1197-1209
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• 1999

Twenty-one dogs(male 11 heads, female 10 heads) which were about 16 months ($16.3{\pm}3.5$) old and 10kg($10.1{\pm}2.0$) body weight, were allotted randomly into four groups as follows. Group I consisted of five dogs whose muscles were operated for sham muscle injuries. Group II consisted of seven dogs treated for cystic duct obstruction. Group III consisted of five dogs treated for the union fracture model. Group IV consisted of five dogs treated for the non-union fracture model. Radiographical and histological observations were carried out to determine bone alkaline phosphatase(BALP) and total alkaline phosphatase(TALP) values of each group for 20 weeks after the treatments with the condition of new bone formation. And also the applicability of percentage of BALP values to TALP (B/T) was studied after BALP was compared respectively with TALP. The level of TALP was increased without any relation to bone formation in group II, and all levels of BALP and B/T were increased in group III. The mean of B/T was high in statistical significance, due to varied levels of B/T and BALP. The changes of rates of B/T were significantly increased only in the case of the active new bone formation in group III, union fracture model. It was recognized that the mean values of B/T were statistical significant of the high applicability of the B/T ratio as an index of bone formation.

• 한국수소및신에너지학회논문집
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• 제23권3호
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• pp.207-212
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• 2012

This study was performed to observe the change of stainless steel pipe interacting with alkaline solution. We used STS316L and STS304 as samples which were soaked in alkaline solution. We measured the samples by use of FE-SEM, EDX, SIMS to observe the surface and depth profile of both samples. The result showed that the precipitate appeared on the surface of both samples from 5 days. but the precipitate was confirmed to be decreased as time passes. but the quantitative change of precipitates at both samples was different as time passed. The EDX showed that the precipitate is Potassium from solution of Electrolysis. The result also showed that the primary elements of stainless steel pipeline and of Alkaline Solution were changed. The change of primary elements was severe between 5 days to 16 days and was stable around 40 days at both samples. The reaction of STS316L with alkaline solution was lower than STS304. We hoped that this study would be the foundation of developing the electrode of the alkaline hydrogen generator.

• 한국표면공학회지
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• 제43권2호
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• pp.105-110
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• 2010

Electroless nickel plating on porous carbon substrate for the application of MCFC electrodes was investigated. Acidic and alkaline bath were used for the electroless nickel plating. The pore sizes of carbon substrates were 16-20 ${\mu}m$ and over 20 ${\mu}m$. The carbon surface was changed from hydrophobic to hydrophilic after immersing the substrate in an ammonia solution for 40 min at $60^{\circ}C$. The contact angle of water was decreased from $85^{\circ}C$ to less than $20^{\circ}$ after ammonia pretreatment. The deposition rate in the alkaline bath was higher than that in the acidic bath. The deposition rate was increased with increasing pH in both acidic and alkaline bath. The content of phosphorous in nickel deposit was decreased with increasing pH in both acidic and alkaline bath. The contents of phosphorous is low in alkaline bath. The minimum concentration of $PdCl_2$ for the electroless nickel plating was 10 ppm in alkaline bath and 5 ppm in acidic bath. The thickness of nickel was not affected by the concentration of $PdCl_2$.

• 한국해양공학회지
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• 제22권1호
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• pp.58-63
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• 2008

The effect of alkaline environmental condition on durability of GFRP composites according to additives was investigated. Additives used were polyvinyl alcohol(PVA), kaolin and alumina powder. Weight gains increased with immersion time in all GFRP composites at $80^{\circ}C$. But weight gain of specimen added PVA did not differ through the wlwle immersion time in both tap water and alkaline solution at 20 and $80^{\circ}C$. Tensile strength decreased with immersion time in all environment conditions. Tensile strength of GFRP composites regardless of additives decreased rapidly up to 5 days of immersion and then decreased slowly up to 30 days in alkaline solution environment at $80^{\circ}C$. Weight gains had not. much difference in both tap water and alkaline solution at $20^{\circ}C$. And weight gain of GFRP composites added polyvinyl alcohol had smaller than the others through the whole immersion time in both tap water and alkaline solution at $20^{\circ}C$ and $80^{\circ}C$. Tensile strength of GFRP composites added polyvinyl alcohol had higher than the others through the whole immersion time in both tap water and alkaline solution at $20^{\circ}C$ and $80^{\circ}C$.

• Journal of Microbiology and Biotechnology
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• 제33권2호
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• pp.195-202
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• 2023

Protease is a widely used enzyme particularly in the detergent industry. In this research, we aimed to isolate alkaline protease-producing bacteria for characterization as a laundry detergent additive. The screening of alkaline protease production was investigated on basal medium agar plus 1% skim milk at pH 11, with incubation at 30℃. The highest alkaline protease-producing bacterium was 6BS15-4 strain, identified as Bacillus gibsonii by 16S rRNA gene sequencing. While the optimum pH was 12.0, the strain was stable at pH range 7.0-12.0 when incubated at 45℃ for 60 min. The alkaline protease produced by B. gibsonii 6BS15-4 using dairy effluent was characterized. The optimum temperature was 60℃ and the enzyme was stable at 55℃ when incubated at pH 11.0 for 60 min. Metal ions K⁺, Mg²⁺, Cu²⁺, Na⁺, and Zn²⁺ exhibited a slightly stimulatory effect on enzyme activity. The enzyme retained over 80% of its activity in the presence of Ca²⁺, Ba²⁺, and Mn²⁺. Thiol reagent and ethylenediaminetetraacetic acid did not inhibit the enzyme activity, whereas phenylmethylsulfonyl fluoride significantly inhibited the protease activity. The alkaline protease from B. gibsonii 6BS15-4 demonstrated efficiency in blood stain removal and could therefore be used as a detergent additive, with potential for various other industrial applications.

• 자원환경지질
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• 제20권2호
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• pp.85-95
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• 1987

The host rocks of titaniferous magnetite deposits in Gonamsan are alkaline gabbros, which are typical of undersaturated alkaline rocks in terms of the lack of normative quartz. According to field occurrences and petrographic features, these alkaline gabbros are divided into 3 rock types: coarse-grained and pegmatitic rock, medium-grained rock with equigranular texture, and layered cumulate rock. All these rocks mainly contain clinopyroxene(salite), plagioclase(An 43-66), pargasite, and ilmenite. The accessory minerals are apatite, sphene, quartz, and sometimes titaniferous magnetite. Pargasite, sphene, and quartz are considered to be secondary minerals formed by the reaction among clinopyroxene, plagioclase and Fe-Ti oxide at deuteric stage. Fe-Ti oxides generally occur as ilmenite in the alkaline rocks, and titaniferous magnetite in the ore deposits. Layered cumulate rocks are characterized by a recurrence of discontinuous thin mesolayer of clinopyroxene-pargasite within leucolayer mainly composed of plagioclase. Clinopyroxene is cumulus mineral whereas plagioclase, ilmenite and apatite occur as intercumulus minerals. According to the variation diagrams of oxide and trace element contents against the differentiation index, incompatible elements, such as Na, Ba and Sr, show positive correlations whereas compatible elements, such as Mg and Cr, show negative correlations. However some compatible elements, such as Co, Ni and V show irregular variations, reflecting relative cumulate status of cumulus and intercumulus minerals. On the de la Roche multicationic diagram, these alkaline gabbros are distributed along the differentiation curve of undersaturated alkaline series from alkaline basaltic composition through basanitic composition to tephritic composition. Layered cumulate rocks, which are distributed between basanitic composition and tephritic composition, reflect their cumulate character, slightly scattering away from the curve. The medium-grained rock shows higher contents in Ba, Sr and light rare earch elements than the coarse-grained and pegmatitic rock. The former shows two times higher contents of total rare earth elements than the latter, $while(La/Lu)_{cn}$ ratios maintain fairly constant values of 5.08~5.06 in these two rocks. This means that coarse-grained and pegmatitic rock, as compared with the medium-grained rock, was formed by the earlier differentiated magma but rare-earth element distribution pattern remained almost parallel during differentiation. From the data the above mentioned, these alkaline gabbros are considered to be comagmatic and to be formed by intrusions of differentiated magmas in its reservoir.

• 대한치과교정학회지
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• 제27권4호
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• pp.599-605
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• 1997

지속적 및 간헐적인 가압력이 배양치주인대 세포의 ALP 활성도에 미치는 영향을 알아보기 위하여 치주인대세포를 24well 배양접시에 배양한 후 밀생상태가 되었을 때, 세포배양기 속의 특수제작된 사각상자에 배양접시를 넣은후 실험 기간동안 $300g/cm^2$의 압력 을 지속적으로 가한 군, 그리고 $300g/cm^2$의 압력을 10분간 가압시킨 후 10분간 가압이 중지되도록 한 간헐적 가압군, 그리고 압력을 가하지 않은 군을 대조군으로 하여 각각 실험 24시간, 48시간, 72시간 후의 alkaline phosphatase의 활성도를 측정하여 다음과 같은 결과를 얻었다. 1. 가압 24시간 군에서는 간헐적 가압군이 대조군에 비하여 ALP활성도가 낮게 나타났다 (P<0.05). 2. 가압 48시간 군에서는 실험군은 대조군에 비하여 ALP 활성도에 유의한 차이는 나타나지 않았다. 3. 가압 72시간 군에서는 지속적 가압군이 대조군에 비하여 ALP활성도가 높게 나타났다 (P<0.01).

• 한국식품과학회지
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• 제51권3호
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• pp.237-242
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• 2019

밀가루에 면류첨가알칼리제를 첨가한 밀가루 면(0.2, 0.4%)과 밀가루에 쌀가루(10-40%)와 면류첨가알칼리제(0.2, 0.4%)를 첨가한 쌀가루 면의 품질 특성을 비교하고 쌀가루와 면류첨가알카리제의 최적 첨가량을 조사하였다. 면에 쌀가루를 첨가할 경우 밀가루면 대비 색도가 밝아지는 것을 알 수 있었으며, 황색도는 알칼리제의 첨가량이 많아질수록 높게 나타났다. 조리적 특성을 보면 쌀가루를 첨가할수록 조리면의 수분흡수율, 부피, 무게가 감소하였으며, 반면에 탁도는 높아지는 경향이 나타나 조리 과정 중에 쌀전분의 용출작용이 병행되는 것을 알 수 있었다. 쌀가루의 면의 조직감은 쌀가루 첨가량이 적정수준을 넘어가면 경도, 탄력성, 씹힘성, 신장성이 떨어지는 경향을 보였다. 본 연구결과 20% 쌀가루와 0.4% 알칼리제를 첨가한 면이 밀가루에 알칼리제 0.4% 첨가한 면과 유사한 조직감을 나타내었다. 따라서 본 연구결과는 쌀가루 및 면류첨가알칼리제를 첨가한 쌀국수 제조방법의 기초자료로 제공되어 향후 연구 수행에 도움을 줄 수 있을 것으로 판단된다.

• 대한약리학회지
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• 제9권1호
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• pp.47-51
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• 1973

A benzomorphan derivative, pentazocine has both opioid agonistic actions and weak narcotic antagonistic activity. In this paper, authors attempted to study the dose response of pentazocine on the blood sugar level, serum transaminase and alkaline phosphatase activity in rabbits. Eighteen rabbits were devided into 3 groups, and each group were injected with pentazocine 5mg, 15mg, and 30mg/kg respectively. And metabolic effects were investigated measuring the change of blood sugar contents, serum transaminase (S-GOT, S-GPT) activities and alkaline phosphatase activities in rabbits. The results were obtained as follows; 1. Pentazocine significantly increased the blood sugar content in rabbits. 2. Pentazocine significantly increased the serum GOT activity but in the serum GPT activity, it significantly increased in large dose. 3. Pentazocine significantly increased serum alkaline phosphatase activity.

• 자원리싸이클링
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• 제10권3호
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• pp.43-50
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• 2001

폐망간전지 및 폐알칼리망간전지를 자원화하기 위한 전처리 공정으로 폐전지의 분쇄 및 자력선별 특성을 살펴보았다. 분쇄는 타발형 중속분쇄기를 사용하였으며 분쇄시 알칼리망간전지보다는 망간전지의 단체분리가 잘 이루어짐을 알 수 있었다. 분쇄산물의 자력선별 결과 자성체 대부분은 8 mesh 이상의 조립산물에 분포하였다. 따라서 폐망간전지, 폐알칼리망간전지 1톤을 분쇄하고 이 분쇄산물을 8 mesh로 체질한 뒤 8 mesh 이상의 조립산물만을 자력선별하면 철 함량이 각각 94%, 88%인 자성체를 214kg, 235kg분리할 수 있음을 알 수 있다.